[Haskell-beginners] Signals and external bindings...

[Edward Z. Yang]

It is a tricky subject, but not insurmountable.

    http://blog.ezyang.com/2010/08/interrupting-ghc/
    http://www.haskell.org/ghc/docs/7.2.2/html/users_guide/ffi.html#ffi-interruptible
    http://blog.ezyang.com/2010/11/its-just-a-longjmp-to-the-left/

Cheers,
Edward

Excerpts from Mike Meyer's message of Wed May 02 13:00:41 -0400 2012:
> I've just finished a QAD project in Python, and expect them to ask
> me to build the production version of the same project. I'd like to
> switch to Haskell, but (again, for those who noticed) have some
> questions I'd like answered.
> 
> One problem I ran into is that I use Unix signals to control the
> various processes. In CPython, this causes a problem with extension
> code because the python signal handler at the C level just note the
> signal, then wait to run the Python "signal handler" the next time the
> interpreter. Since my extensions are doing the heavy lifting, they
> often run for long periods (by which I mean 10s of minutes). Meaning
> the signal is ignored for long periods.
> 
> Since I expect to such extensions (the wrappers are available) and
> want to leave the control mechanisms in place, I'd like to know if I'm
> going to have similar problems in Haskell.
> 
>       Thanks,
>       <mike